JPS61181191A - Thick film printed device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a thick film printing apparatus used for forming conductor or insulator thick film members on insulating plastic films using screen printing technology.

2. Description of the Related Art A conventional thick film printing apparatus of this type has a cross-sectional view shown in FIGS. 3 and 4. This will be explained below with reference to the drawings. FIG. 3 is a diagram for explaining the principle of screen printing technology, and FIG. 4 is a detailed description of the thick film printing apparatus shown in FIG. 3. In FIG. 3, 11 is a squeegee, 12 is a conductive or insulating paste, 13 is a plate frame with a plate stretched over it, and 18 is an insulating plastic film 17.
2o is a conductive or insulating thick film printed part printed on an insulating plastic film. In Fig. 4, 301L is a stageless screen, 30b is a plate coating, and 40&
, 40b, 400.40d are openings in the plate coating 30b.

Regarding the conventional thick film printing device configured as described above,
Its operation will be explained below. The conductive or insulating paste 12 supplied onto the plate surface 30 is applied to the plate coating 3o by a squeegee 11 that moves (into the drawing direction) while pressing the plate surface 3o, that is, the stainless steel screen 30&.
Opening part 40 of b! A conductive or insulating paste 12 is discharged from L to 40 (1), and a thick film printed portion 2o is formed on the insulating plastic film 17.

Problems to be Solved by the Invention However, in the above configuration, defects as shown in FIG. 5 occur. This will be explained below with reference to the drawings.

FIG. 5 is a front view showing an insulating plastic film printed by a conventional thick film printing apparatus. Fifth
In the figure, 17 is an insulating plastic film, 201 to 20C are conductive or insulating thick film printed parts, and 50.60 is the thick film printed part 201.
These are defective parts on the verge of short circuit and on the verge of short circuit consisting of ~20C.

These defective parts occur for the following reasons.

In other words, the insulating plastic film has great electrical insulation properties and a very high specific resistance, so it is easily charged with static electricity, and this electricity does not leak easily.

Therefore, printing problems occur during screen printing due to static electricity that is charged during the pre-printing process on insulating plastic film. This causes a defective portion 50.60.

As a countermeasure, it is generally done to remove the static electricity charged on the insulating plastic film with a static eliminator immediately before printing, but this is a very difficult task.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a thick film printing apparatus that has a simple configuration and can perform good screen printing.

Means for Solving the Problems In order to solve the above problems, the thick film printing apparatus of the present invention includes:
One end of a metal plate frame equipped with a stainless steel screen printing plate and one end of a metal printing table are electrically grounded.

Function: With the above-described configuration, the static electricity charged on the insulating plastic film is sandwiched between the stainless steel screen printing plate and the metal printing stand that are in contact with the plastic film by suppressing the squeegee during screen printing. , can be removed because it is electrically grounded.

EXAMPLE Hereinafter, a thick film printing apparatus according to an example of the present invention will be described with reference to the drawings. Figure g1 shows a sectional view of the thick film printing apparatus in the first embodiment of the present invention. In Figure 1, 1 is a squeegee, 2 is a conductive or insulating paste, 3 is a metal plate frame covered with a stainless steel screen 4, 6 is a plate coating, and 6 is an insulating plastic film. , 7 is a metal printing stand, 8 is grounded from one end of the metal plate frame 3, and 9
is grounded from one end of the metal printing table.

The operation of the thick film printing apparatus configured as described above will be described below with reference to FIGS. 1 and 2. First, the second
The figure is a front view showing a good thick film printing section obtained using the thick film printing apparatus according to the present invention.

The conductive or insulating paste 2 supplied onto the stainless steel screen 4 is applied to the conductive or insulating paste from the opening of the plate coating 5 by the squeegee 1 that moves while pressing the stainless steel screen 4 (in the direction B in the figure). paste 2
is discharged, and thick film printed portions 2&~2C are formed on the insulating plastic film 6.

As described above, according to this embodiment, in a thick film printing apparatus that performs thick film printing on an insulating plastic film,
By electrically grounding one end of the metal plate frame equipped with the stainless steel screen printing plate used for the thick film printing and one end of the metal printing table, the above-mentioned Static electricity charged on the insulating plastic film is removed by sandwiching it with the stainless steel screen printing plate and the metal printing stand that are in electrical contact with the insulating plastic film by suppressing it with a squeegee during screen printing. is possible,
No printing problems occur due to static electricity.

In the above embodiment, one end of the metal plate frame equipped with the stainless steel screen printing plate and one end of the metal printing table are electrically grounded, but the metal plate equipped with the stainless steel screen printing plate A similar effect can be obtained by grounding only one end of the frame.

Although the stainless steel screen 4 is used in the above embodiment, it is not limited to a stainless steel screen, and may be a conductive material whose surface is plated with metal, such as Tetron, nylon, or silk.

Effects of the Invention As described above, the present invention has one end of the metal plate frame equipped with the stainless steel screen printing plate and one end of the metal printing stand grounded, thereby effectively dissipating static electricity charged on the insulating plastic film. The film can be removed at the same time as printing, and printing problems caused by the static electricity do not occur.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a thick film printing device according to a first embodiment of the present invention, FIG. 2 is a front view showing good printing in the thick film printing device of FIG. 1, and FIG. 3 is a conventional thick film printing device. FIG. 4 is a detailed sectional view of FIG. 3, and FIG. 6 is a front view showing printing including all defects in a conventional thick film printing apparatus. 3...Metal plate frame, 4...Stainless steel screen, 7...Metal printing stand, 8.9...
...Earth grounding. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3-11 Keiji plate making 4-11 Stainless Sukuthorn Figure 2 Figure 3

Claims (1)

[Claims] A thick film printing device that performs thick film printing on an insulating plastic film, wherein one end of a metal plate frame equipped with a stainless steel screen printing plate used for the thick film printing and one end of a metal printing stand are electrically connected. A thick film printing device that is uniquely grounded.